the fbi found two of weapons stashes. authorities in alaska where he was being held were planning to interview him next week but at 6:30 sunday morning israel keyes was found dead in his cell. no word on the cause of death or he left a note. there will be autopsy while the fbi continues to investigate his decade-long killing spree. back to you. jenna: rick, thank you. gregg: turning to one of the nation's most infamous serial killers. more than three decades after john wayne gacy was convicted of killing 33 people, investigators say they may now be able to identify even more victims. a sheriff's deputy discovered a vial of his blood. it was entered into the fbidna database. how likely is it now that police will be able to reopen some cold cases linked to gacy? could it apply other cold cases? let's bring in forensic pathologist, michael baden and mary o'toole, author of, dangerous instincts. dr. baden, explain, i automatically assumed that a serial killer's dna would be in the dna database. and it wasn't? >> the dna datab